Has any one a idea where you can find specs of a alternator and its regulator from a chevy 3600 6.0 liter 140 amp year 2005 express
Its a Thor Four winds 28A

I just want to know how long its going in bulk charge and how high in volts
This to charge also my house batteries when i am driving
It seems to me that its a very short time that it stays on 140 amp
Any one a idea where i can find those specs
And even better how i can change them(if uberhaupt)

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Your tow vehicle's alternator out put is tied to the battery in the vehicle, when the truck battery gets to full charge the alternator output will drop to a maintenance charge for the truck battery.
If the truck charge wire to your trailer is factory installed , it will probably be protected by a 40 amp circuit breaker and that is also a limiting factor.
If you're boondocking and running your RV batteries down frequently , maybe solar on the RV would be your best option.

On a 12 volt system the high cutout voltage should be between 14.3 - 14.9 depending on the voltage regulator installed on your alternator. This voltage will be maintained when the battery is fully charged and the electrical load is low. As you add electrical load by turning on more accessories, the voltage will drop. By using Ohm's Law, you can calculate that when amperage goes up, voltage will go down. The higher the amperage load is to the alternator's maximum rated output, the lower the voltage will be. For example, if you have a 100 amp alternator and are using 80 amp, the voltage will be about 13.5V. If you bring your load up to 101 amp, then the voltage in the system will drop below 12.8V because the extra 1 amp that is needed and not coming from the alternator will have to be stolen from the vehicle's battery and hence the voltage will start dropping below the static battery level. Keep in mind that you might experience this scenario more often at idle speeds because an alternator will not be able to produce its rated capacity at low RPM speeds. Using a smaller diameter pulley or raising the vehicle's idle RPM can sometimes give you the added RPM to get the alternator to charge at a higher rate.